Laser welding gas protection and dedusting device, welding method and control system

Abstract

The invention relates to the technical field of laser welding processing and provides a laser welding gas protection and dedusting device which comprises a base, a dust hood, two sliding blocks, an air supply pipe and a first spring; the base comprises a welding hole, a laser beam passage and sliding chutes; the laser beam passage is arranged at the upper end of the welding hole; the sliding chutes are symmetrically formed in the two sides of the welding hole and is provided with the first spring; the two sliding blocks are mounted in the sliding chutes in the two sides of the welding hole; the two sliding blocks are mutually crowded to the welding hole under the action of the first spring; penetrating air passages are arranged in the sliding blocks and are connected with the air supply pipe on the sides, far away from the welding hole, of the sliding blocks; the air supply pipe extends out of the sliding chutes; the dust hood comprises a laser opening and an exhaust port and covers the base; and the laser opening is formed right above the laser beam passage. When the laser welding gas protection and dedusting device is adopted for laser welding, the oxygen isolating welding statecan enter more quickly to avoid oxidization, so that the product welding quality is ensured, and the product yield is increased.

Description

technical field [0001] The invention relates to the technical field of laser welding processing, in particular to a gas protection and dust removal device for laser welding, a welding method and a control system. Background technique [0002] Laser welding technology belongs to fusion welding, which uses laser beam as energy to make it impact on the joint of the object to be welded to achieve the purpose of welding. Laser welding machine technology is widely used in high-precision manufacturing fields such as automobiles, ships, aircraft, and high-speed rail. [0003] At present, in the process of welding with a power battery laser galvanometer system, protective gases such as nitrogen and other inert gases can be used to assist in welding to isolate oxygen and avoid oxidation. However, due to the initial presence of oxygen, it will mix with the shielding gas that has just been sprayed out. In order to avoid affecting the initial welding quality, the time to start welding c...

AI Technical Summary

Problems solved by technology

However, due to the initial presence of oxygen, it will mix with the shielding gas that has just been sprayed out. In order to avoid affecting the initial welding quality, the time to start welding can only be postponed; in addition, the shielding gas sprayed out during welding is dispersed, resulting in insufficient isolation and affecting the welding quality. Product welding The quality is poor, the protection of the protective gas is not good enough, it is easy to oxidize, and the product yield is not high, which will greatly increase the production cost of the enterprise. Therefore, the selection of the power battery laser welding method and welding process will directly affect the cost, quality and safety of the product. and product consistency

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